A Study of Glass Transition of Polymeric Materials by Specific Heat Spectroscopy

比热光谱研究高分子材料的玻璃化转变

• 批准号: 03805082
• 负责人: SARUYAMA Yasuo
• 金额: $ 1.09万
• 依托单位: KYOTO INSTITUTE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03805082/
• 关键词: Alternating Light Heating Method; AC Calorimetry; Specific Heat Spectroscopy; Polymer; Glass Transition; 熱容量スペクトロスコビー; ACカロリメトリ-; 熱容量スペクトロスコピ-

1. An experimental system of AC calorimetry constructed in our laboratory was used. The lock-in amplifier used in the system was replaced with FFT analizer to make measuring time shorter.2. Conventional AC calorimetry system uses a rotating plate with holes as the light modulator for periodic heating of the sample. In this project two polarizing plates, one of which is rotated and the other is fixed, were employed as the light modulator to obtain sinusoidal light intensity. The heating frequency became much more accurate by using a stepping motor.3. The program of the personal computer to control the whole experimental system was changed to fit the FFT analyzer and the stepping mortar controller. Using the new program we can make measurement changing the heating frequency successively.4. Preliminary measurement was made for Polystylen (MW=2000). The measuring time was less than one tenth of the measuring time of the conventional method using a lock-in amplifier. The main object of this project to make the measuring time shorter was carried out. Study of the thermal history which is important for the properties of polymeric materials will be progressed by this new experimental system.5. The heating frequency is limited in the range of 0.5Hz to 30Hz at present. To expand the frequency range is left as a future problem.

1。使用了我们实验室中构建的AC量热法的实验系统。系统中使用的锁定放大器被FFT肛门仪替换，以使测量时间短。2。常规的交流量热法系统使用带有孔的旋转板作为光调节器，以定期加热样品。在该项目中，将两个偏振板（其中一个旋转，另一个是固定的）作为光调节器的使用，以获得正弦光强度。通过使用步进电动机，加热频率变得更加准确。3。更改了个人计算机以控制整个实验系统的程序，以适合FFT分析仪和垫脚砂浆控制器。使用新程序，我们可以连续更改加热频率的测量。4。对聚基因进行了初步测量（MW = 2000）。测量时间不到使用锁定放大器的常规方法测量时间的十分之一。该项目的主要目的是使测量时间较短。对聚合物材料特性至关重要的热历史的研究将通过这种新的实验系统进行进展。5。目前，加热频率在0.5Hz至30Hz的范围内受到限制。扩大频率范围是将来的问题。